#include <rtthread.h>
#include <rtdevice.h>
#include "mcu_api.h"

/* 用于接收消息的信号量 */
static struct rt_semaphore rx_sem;
static rt_device_t serial;

/* 接收数据回调函数 */
RT_SECTION(".irq.usart")
static rt_err_t uart_input(rt_device_t dev, rt_size_t size)
{
    /* 串口接收到数据后产生中断，调用此回调函数，然后发送接收信号量 */
    rt_sem_release(&rx_sem);

    return RT_EOK;
}

void serial_device_send(char ch)
{
    rt_device_write(serial, 0, &ch, 1);
}

/*串口设备初始化打开*/
static rt_err_t serial_device_init()
{
    rt_err_t ret = RT_EOK;
    /* 查找系统中的串口设备 */
    serial = rt_device_find("uart1");
    if (!serial)
    {
        rt_kprintf("find %s failed!\n");
        return RT_ERROR;
    }

    /* 初始化信号量 */
    rt_sem_init(&rx_sem, "rx_sem", 0, RT_IPC_FLAG_FIFO);
    /* 以中断接收及轮询发送模式打开串口设备 */
    ret = rt_device_open(serial, RT_DEVICE_FLAG_INT_RX);
    if(ret != RT_EOK)
    {
        rt_kprintf("serial device opern fail \n");
        return ret;
    }
    /* 设置接收回调函数 */
    rt_device_set_rx_indicate(serial, uart_input);

    return RT_EOK;
}


static void serial_thread_entry(void *parameter)
{
    serial_device_init();
    wifi_protocol_init();
    char ch;

    while (1)
    {
        /* 从串口读取一个字节的数据，没有读取到则等待接收信号量 */
        while (rt_device_read(serial, -1, &ch, 1) != 1)
        {
            /* 阻塞等待接收信号量，等到信号量后再次读取数据 */
            rt_sem_take(&rx_sem, RT_WAITING_FOREVER);
        }
        
        uart_receive_buff_input(&ch, 1);

        wifi_uart_service();
    }
}

static int network_thread_create(void)
{
    rt_err_t ret = RT_EOK;

    /* 创建 serial 线程 */
    rt_thread_t thread = rt_thread_create("serial", serial_thread_entry, RT_NULL, 2024, 15, 10);
    /* 创建成功则启动线程 */
    if (thread != RT_NULL)
    {
        rt_thread_startup(thread);
    }
    else
    {
        ret = RT_ERROR;
    }

    return ret;
}

INIT_APP_EXPORT(network_thread_create);
